I'm very new to coding and modding and I was wondering if someone could help me do a mod that makes me able to use 

channeling tridents without thunderstorms and also channeling does extra damage.

This is not the right place to ask something like this, as it belongs to the modder support section. Anyway, i would do it like that: handle the ProjectileImpactEvent.Arrow event and check if the projectile entity provided by the event is a trident entity..you can do this because the trident entity extends from the AbstractArrowEntity class. Then check if the trident is currently enchanted with channeling and also if there is not a thunderstorm currently going on in the world. In case both are true just spawn a lightning bolt at the target entity position. If you look at the vanilla TridentEntity class onEntityHit method you can see:

1) How to check if the trident is enchanted with channeling

2) how to check if there is a thunderstorm in the world

3) how to spawn a lightning bolt entity

If nothing of the above make sense for you, since you are new to both coding and modding then i suggest a good look at the Forge documentation (link at the top of the page)

Edited March 26, 20214 yr by Beethoven92